An 1884 notebook in which Mark Twain, “toying with the notion of a physician trying to write a play,” experimented with several hilarious character names. // A Peek Inside the Notebooks of Famous Authors, Artists and Visionaries
When it is attacked the Atolla wyvillei (Alarm) Jellyfish, a deep sea crown jellyfish, uses its bioluminescence to attract (hopefully) larger predators, which in turn will attack it's attacker. The motion of the creature in itself is quite mesmerising.
The vampire squid can turn itself "inside out" to avoid predators. This video was released by the Monterey Bay Aquarium Research Institute to emphasize the need to protect species like this in the deep oceans from the effects of human activities.